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Scientists have discovered some mysterious “perfectly aligned” holes in the sediment 1.7 miles below the surface of the Atlantic Ocean and still don’t know what caused them.
They were found by the US National Oceanic and Atmospheric Administration (NOAA) while conducting an exploration of the seabed around the mid-Atlantic ridge using a remotely piloted vehicle, according to Sky News.
The holes, which may be holes or tracks, were found in the sediment near the top of an underwater volcano north of the Azores.
In a Facebook post, NOAA acknowledged that the holes had previously been reported from the region, “but their origin remains a mystery.”
“While they look almost man-made, the small piles of sediment around the holes make them look like they were dug by… something,” the agency wrote, before asking its followers to suggest their own ideas.
Some people questioned whether a machine had sampled sediment, or rocks shifting beneath the ocean floor, releasing the bubbling methane from within the Earth.
The underwater exploration was meant to reveal the submerged mountain range, but the images captured on July 23 have baffled scientists.
NOAA says the mid-Atlantic ridge has “active tectonic spreading” and is the site of frequent earthquakes as well as a hotbed of hydrothermal vents.
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